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What trace elements do chickens need as supplements?
The trace elements chickens need include manganese, iron, copper, zinc, iodine, magnesium, sulfur, selenium, and so on. Although these elements are needed in extremely small amounts, they play a very important role in chickens' growth and development, reproduction, nutrient metabolism, and the quantity of products. Some of these elements are needed in extremely small amounts, and an excess can easily cause poisoning, so the amount given must be accurate and mixed evenly. Manganese: the main role of manganese is related to phosphorus and calcium metabolism, growth and development, egg growth, embryonic development, reproduction, and health. When the diet lacks manganese, chicks develop poor bone development, perosis, loss of movement
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How to prevent and control lily anthracnose? These methods you need to master
Symptoms: Leaves develop round, pale yellow spots, with dark brown margins. On petals the spots are round and flax-colored. They occur mainly on the outer surface of the upper half of the scales, and also on the inner surface. Initially irregular, light brown spots appear, later becoming light blackish brown and slightly sunken, and finally the diseased area becomes almost black, with the tissue shriveling and dry-rotting. The spots can extend several layers deep into the scales, but the outermost scales are affected most severely. Flower buds on diseased bulbs abort, turning brown to black, or large numbers of small water-soaked round spots appear on the flowers, merging with each other into irregular brown patches
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What time and conditions are needed for artificially rearing queen bees?
When the new bees reared by the colony that year have completely replaced the old overwintering bees and the colony has entered its growth and expansion period with a relatively strong population, you can prepare for artificial queen rearing. In the north, it is best to rear queens in early summer when the daytime temperature is stable above 20°C and there is a nectar source, especially when there is an abundant pollen source and drones also begin to emerge one after another. In North China this is generally in May. This can ensure the quality of the queen bee, and also allows the early replacement of aging queens with new queens. Colonies with a queen from the current year will not undergo natural swarming. Use the new queens reared early to carry out artificial colony splitting
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How to prevent and treat Newcastle disease in chickens? These methods you need to master
Newcastle disease in chickens, also called Asian fowl pest, commonly known as fowl plague, is a highly contagious, acute, and virulent infectious disease of chickens caused by Newcastle disease virus. It often presents as septicemia, with the main features being difficulty breathing, diarrhea, nervous system disorders, and hemorrhage of mucous membranes and serous membranes. I. Epidemiological characteristics: chickens of all breeds and ages can be infected, with young chickens and growing chickens being more susceptible, and older chickens over two years of age having reduced susceptibility. The main sources of infection for this disease are sick chickens and virus-carrying chickens; their secretions, feces, as well as contaminated feed, drinking water, non-susceptible wild birds, external parasites, humans and livestock can all transmit the pathogen. The main routes of transmission are the digestive tract and respiratory tract, and it can also invade the body through damaged skin and mucous membranes. It can occur in all four seasons. In non-immune areas or in flocks with low immunity, once a velogenic strain invades, it can spread rapidly, causing a devastating epidemic, with morbidity and mortality reaching over 90%. At present, in large and medium-sized @#@230@#@ farms, where flocks have a certain level of immunity, Newcastle disease mainly appears in an atypical form, which should be given attention.
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How to prevent common pig diseases in winter? These methods you need to know
Before winter arrives, do a good job of immunizing the breeding herd: such as foot-and-mouth disease, epidemic diarrhea, transmissible gastroenteritis, swine fever, pseudorabies, blue ear disease and other preventive vaccinations, and do a good job of deworming. Sow immunization: before farrowing, the injections of transmissible gastroenteritis and epidemic diarrhea bivalent vaccine, pseudorabies and other vaccines should be done according to plan, so that sows are at a relatively high immune level. Piglet immunization: there is considerable controversy over blue ear disease immunization; it is recommended to use blue ear disease attenuated vaccine at 15 days of age. Drug prevention
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What tools and equipment are needed for cultivating Armillaria in Gastrodia elata cultivation
Cultivating fungi is a highly technical and very meticulous task, requiring a considerable level of technical skill and the necessary equipment, tools, and so on. The main equipment and tools needed are: 1) Sterile box: The sterile box, also called an inoculation box, is a small box made of wood and glass that can be sealed to allow fumigation with chemicals and prevent contamination by unwanted microorganisms. The front and back of the sterile box are fitted with glass windows that can be opened and closed, and two openings are made at the bottom, fitted with cloth sleeves, through which both hands can be inserted to work inside the box. A fluorescent lamp or ultraviolet sterilizing lamp is installed at the top inside the box. 2) Sterile room: It is the same as
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What kind of environmental conditions does Gastrodia elata need to grow?
I. The effect of temperature on the growth of Gastrodia elata. Temperature is the main factor affecting the growth of Gastrodia elata. Gastrodia elata prefers to grow in an environment that is relatively cool in summer and not too severely cold in winter. The longer the period of suitable temperature for its growth, the more favorable it is for the growth of Gastrodia elata. (1) The effect of temperature on the asexual reproduction of Gastrodia elata. The underground tubers of Gastrodia elata begin to grow when the ground temperature is around 14°C, grow faster at 20-25°C, and are inhibited at 30°C. Within one year, the total accumulated temperature over the entire growing season is about 3800°C. At an altitude of 1000
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What temperature conditions does Gastrodia elata need to grow?
Q: What kind of temperature conditions does Gastrodia elata need to grow? What are the extreme temperatures? A: This question seems simple, but is actually rather complex. Based on the actual situation in our province, we might as well give a brief explanation from the following two aspects. First, the original intention of most farmer friends in asking this question should refer to the adaptability of Gastrodia elata tubers to temperature in asexual cultivation. As a plant, Gastrodia elata has no roots and no leaves, and its ability to adapt to and regulate temperature is weak, which is its growth disadvantage. However, since
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How to prevent and treat winter diarrhea in pigs? Pig farmers need to master these methods
Winter diarrhea is epidemic diarrhea of pigs in winter. The peak incidence period is from mid-December to mid-January of the following year; the onset is acute, the spread is rapid, and the epidemic range is wide; the incidence rate is high and the mortality rate is low, seriously affecting the growth and development of pigs. Symptoms The incubation period of this disease is generally 12 hours to 18 hours. After adult pigs are infected, watery diarrhea appears. The feces are initially grayish white, gradually becoming yellowish green, with a foul odor. Abdominal distension, vomiting, and body temperature initially rises to 40°C to 41°C. Once diarrhea occurs, the body temperature drops, and the pig is thirsty and drinks eagerly. Piglets within 10 days of age suddenly vomit, followed by watery diarrhea, with curds in the stool, and if not treated in time, they become emaciated and die. The author used integrated traditional Chinese and Western medicine to treat more than 100 cases, with an effective rate of over 96%.
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How many snakes are needed to collect 1 gram of dried venom?
The venom output of different species of venomous snakes varies greatly. Comparing the venom they discharge by dry venom rate, the king cobra averages 101.9 mg per bite, the sea snake only 2.5-5.0 mg, and the many-banded krait 4.6 mg. That is to say, the venom output of the king cobra is 41-20 and 20 times that of the sea snake and the many-banded krait respectively. Obviously, the king cobra's venom output is so large that obtaining 1 gram of its dried venom is easy, requiring only about 10 snakes. However, to obtain 1 gram of dried venom from a sea snake or a many-banded krait, it would take 200-40
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